diff --git a/campus_task/__init__.py b/campus_task/__init__.py
index fb3b7982dae75be0253d3e0c1af67ee91fadadc5..f415f456ab039a5700de50122e021c82492365d8 100644
--- a/campus_task/__init__.py
+++ b/campus_task/__init__.py
@@ -1,4 +1,4 @@
 from .task_model import Task
-from .task_service import add_task, get_all_tasks, mark_task_done, get_task_by_id
+from .task_service import add_task, get_all_tasks, mark_task_done, get_task_by_id, delete_task
 
-__all__ = ["Task", "add_task", "get_all_tasks", "mark_task_done", "get_task_by_id"]
\ No newline at end of file
+__all__ = ["Task", "add_task", "get_all_tasks", "mark_task_done", "get_task_by_id", "delete_task"]
\ No newline at end of file
diff --git a/campus_task/task_service.py b/campus_task/task_service.py
index 5b24eb96610941e86059d2d9154df673dcd8fa1e..cdad05514dae5ef708870f9f7a0e3659fd36dcde 100644
--- a/campus_task/task_service.py
+++ b/campus_task/task_service.py
@@ -35,4 +35,13 @@ def get_task_by_id(task_id: int) -> Optional[Task]:
     for task in tasks:
         if task.id == task_id:
             return task
-    return None
\ No newline at end of file
+    return None
+
+def delete_task(task_id: int) -> bool:
+    tasks = load_tasks()
+    for i, task in enumerate(tasks):
+        if task.id == task_id:
+            del tasks[i]
+            save_tasks(tasks)
+            return True
+    return False
\ No newline at end of file
diff --git a/main.py b/main.py
index dc617c540478cef52c244f1182d1b22c16c3603b..9c2d97e5391b375d03db1bb96421981103d00b10 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,5 @@
 import sys
-from campus_task import add_task, get_all_tasks, mark_task_done
+from campus_task import add_task, get_all_tasks, mark_task_done, delete_task
 
 def print_tasks():
     tasks = get_all_tasks()
@@ -40,14 +40,29 @@ def handle_done(args):
     except ValueError:
         print("任务编号必须是数字")
 
+def handle_delete(args):
+    if len(args) < 1:
+        print("用法: python main.py delete <id>")
+        return
+    try:
+        task_id = int(args[0])
+        success = delete_task(task_id)
+        if success:
+            print(f"任务 {task_id} 已删除")
+        else:
+            print(f"未找到任务 {task_id}")
+    except ValueError:
+        print("任务编号必须是数字")
+
 def interactive_mode():
     while True:
         print("\n===== 校园任务清单 =====")
         print("1. 添加任务")
         print("2. 查看任务列表")
         print("3. 标记任务完成")
-        print("4. 退出")
-        choice = input("请输入选择 (1-4): ")
+        print("4. 删除任务")
+        print("5. 退出")
+        choice = input("请输入选择 (1-5): ")
         
         if choice == "1":
             title = input("请输入任务标题: ").strip()
@@ -72,10 +87,21 @@ def interactive_mode():
             except ValueError:
                 print("任务编号必须是数字")
         elif choice == "4":
+            print_tasks()
+            try:
+                task_id = int(input("请输入要删除的任务编号: "))
+                success = delete_task(task_id)
+                if success:
+                    print(f"任务 {task_id} 已删除")
+                else:
+                    print(f"未找到任务 {task_id}")
+            except ValueError:
+                print("任务编号必须是数字")
+        elif choice == "5":
             print("退出程序")
             break
         else:
-            print("无效选择，请输入 1-4")
+            print("无效选择，请输入 1-5")
 
 def main():
     if len(sys.argv) >= 2:
@@ -88,6 +114,8 @@ def main():
             handle_list()
         elif command == "done":
             handle_done(args)
+        elif command == "delete":
+            handle_delete(args)
         else:
             print(f"未知命令: {command}")
     else:
diff --git a/tests/test_delete.py b/tests/test_delete.py
new file mode 100644
index 0000000000000000000000000000000000000000..e766267e66566f31e839ff0998d4eae885bcede2
--- /dev/null
+++ b/tests/test_delete.py
@@ -0,0 +1,36 @@
+import unittest
+import os
+import sys
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from campus_task import add_task, delete_task, get_all_tasks
+
+class TestDeleteFeature(unittest.TestCase):
+    
+    def setUp(self):
+        if os.path.exists("tasks.json"):
+            os.remove("tasks.json")
+    
+    def tearDown(self):
+        if os.path.exists("tasks.json"):
+            os.remove("tasks.json")
+    
+    def test_delete_existing_task(self):
+        task = add_task("测试任务")
+        result = delete_task(task.id)
+        self.assertTrue(result)
+        self.assertEqual(len(get_all_tasks()), 0)
+    
+    def test_delete_nonexistent_task(self):
+        result = delete_task(999)
+        self.assertFalse(result)
+    
+    def test_delete_last_task(self):
+        add_task("任务1")
+        add_task("任务2")
+        delete_task(1)
+        delete_task(2)
+        self.assertEqual(len(get_all_tasks()), 0)
+
+if __name__ == "__main__":
+    unittest.main()
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